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Simplify delta generation, and avoid two-pass with img backend

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This changeset also drops --keep-exported-images, which is quite unused
and can be replaced with a plugin, or either by manually exporting the
resulting images.
This commit is contained in:
Ettore Di Giacinto
2021-01-24 12:27:07 +01:00
parent 0ae8cbb877
commit 7d11df3225
6 changed files with 46 additions and 93 deletions
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15
pkg/compiler/backend/simpledocker.go
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@@ -184,9 +184,22 @@ type ManifestEntry struct {
}
func (b *SimpleDocker) ExtractRootfs(opts compiler.CompilerBackendOptions, keepPerms bool) error {
src := opts.SourcePath
name := opts.ImageName
dst := opts.Destination
tempexport, err := ioutil.TempDir(dst, "tmprootfs")
if err != nil {
return errors.Wrap(err, "Error met while creating tempdir for rootfs")
}
defer os.RemoveAll(tempexport) // clean up
imageExport := filepath.Join(tempexport, "image.tar")
if err := b.ExportImage(compiler.CompilerBackendOptions{ImageName: name, Destination: imageExport}); err != nil {
return errors.Wrap(err, "failed while extracting rootfs for "+name)
}
src := imageExport
if src == "" && opts.ImageName != "" {
tempUnpack, err := ioutil.TempDir(dst, "tempUnpack")
if err != nil {